LESによる乱流熱対流の数値解析に関する研究

概要

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Numerical simulations are widely used by both academics and industries as an efficient tool to predict heat transfer and fluid motion. The purpose of the present research is to develop a precise numerical method to calculate turbulent natural convection in a compartment, to help the functional design of safe and comfortable environment for marine systems. In this paper, a large eddy simulation (LES) method is presented which can calculate incompressible, unsteady, three-dimensional, viscous and turbulent buoyancy-driven flow fields. This method is a finite difference method with second order precision of both time and space, using Smagorinsky SGS model to treat the turbulence effect. Two examples, Rayleigh-Benard convection and convection in a side heated and cooled rectangular box, are numerically simulated. The difference of using SGS viscosity with and without a buoyant term, are studied. The computed results are compared to other simulation results and experimental data.
社団法人日本船舶海洋工学会の論文
2001-08-31